Filtering pump and the like



Spt. 1, 1931. c. A. wlNsLow FILTERING PUMP AND THE LIKE Filed Nov. 8, 192e wml,

31a/vento@ Patented Sept. `l, 1931 PATENT oFFlcE CHARLES A. 'WINSLOW, 0l' VALLEJO, GALII'OBNIA FILTEBIN PUMP ANDV THE LIKE application mea november' s, im. serial No. 147,171.

My invention relates to means for conveying and filtering iuids such as fuel r lubricating oil for hydrocarbon engines and' a suitable reservoir from which fluid mayI Ybe drawn as required, the object of the improvements being to utilize some of the available means athand not now generally `used for this purpose in combination with hydrocarbon engines etc. l my A further object of the invention relates to 'means for 'conveying liquids or fluids, and a means for maintaining a constant level within the reservoir of the device, from which said fluids may be drawn as required by J' hydrocarbon engines and the like.

- A further obJect of the invention is the rovision of a filter screen and settling chamber adapted to remove the impurities'from .said iiuid on its passage from the storage zo tank to reservoir, within `Vthe casing of the device, a means of automatically cleansing the filtering medium of impurities during the operation of the invention as provide by the cooperating mechanism and its novel '25 construction, and a. means of retaining a constant level of iiuid'within said reservoir.

A further object of the invention is the means forretainingl sufficient fluid lwithin the pumping `mechanism for eiicient operation of thedevice even though the reservoir be drained of its contents, as is clearly shown -in 'the drawings and fully described inthe annexed specifications.

It is clearly understood that I do not wish to limit myself to the use of the device in the forms shown, which are only examples of the application of the principle of applying movement flexibly, from one means to another, for the purpose of pumping and filtering iiuids in combination with the fuel or lubricating system of a hydrocarbon engine etc. One form of the invention is shown, with modifications, as to means of operation of the device and illustrated in Figures 1, 2, 3, and 4.

Figure' 1 is a sectional view of a liquid pump adapted to be operated from impulses transferred from the exhaust or inlet gases of a hydrocarbon engine to a diaphragm of the device as shown.

Figure 2 vis a modification of the device adapted to be operated from a cam movement or the like.

Figure 3 is a further modification of the device adapted to be operated with a reciproeating motion as shown.

Figure 4 is a sectional view taken through -the valve chamber of a conventional hydrocarbon engine and illustrates a suitable means of operating the device from pressure impulses.

In Figure 1, diaphragm 1 is rigidly held on the perlphery between casing 26 and cap member 30, and the central portion is caused to move with a vibrating motion by impulses transferred through a suitable conductor (not shown) from manifold outlet 2, Figure 4. Said vi rating motion or reciprocating motion is transferred to piston 3 within cylinder 3a, Figure 1, through piston rod 4, causin same to operate as follows: The effect o pressure impulse on-upper side of diaphragm causes plston 3 to move downward againsttension of diaphragm and compression of spring 18, on its upward stroke, liquid is caused Vto flow in throu h inlet port 5, under check valve 6, into setthng chamber 7, upwardly through filtering medium 8, and through ports 9, 1n piston 3, and ports 10, in check valve 11, thence upwardly into reservoir 12. As liquid level rises above dotted line A-A, causing space 13' to be lilled through port 14 and annular space 15, cup 16 prevents its return as liquid being incompressible is held in space 13 between cup 16, rigidly mounted on plston rod 4, and member 17, immovably mounted on casing 26. The piston cannot travel upwardly until said liquid is returned through port 14 to a level normally below point indicated by dotted line A-. i

As. liquid level lowers, beyond point A-A, allowing free movement of cup 16 by diaphragm 1, piston 3 resumes pumping action until liquid again fills cup 16, etc.

In the event of reservoir 12 being completely emptied of its contents, cylinder 3a, due to its novel construction and arrangement, always retains its level full of fluid, which serves to vkeep the invention at its maximum pumping efliciency, as the pumping means does not lose its priming under the circumstances of reservoir 12 being completely drained of its contents.'

Springs 18 and 19 aid diaphragm 1 in its reciprocating movement and prevent excess pressure from injurying diaphragm 1.

A novel feature of the device is the means of automatically cleansing the filtering medium 8 of impurities during the passage of fluid therethrough, by the operation as follows: As piston member 3 draws fluid from under valve 6, into a greatly expanded area in settling chamber 7, velocity of said fluid is greatly reduced, and thus impurities are lodged against filtering medium 8, at low velocity and on a large area. As piston member 3 returns on its downward stroke, a surgeback occurs in the fluid before valve member 6 closes. This surge-back tends to dislodge impurities from the lower face of the filtering medium, and deposits them Iin the lower extremities of settling chamber 7 where they may be readily drained by valve 29, as will be clearly understood from the drawings and the foregoing description. However when the device is built especially for heavy fluids such as lubricating oil its form will be modified to comprise a larger settling chamber and filtering medium than the kdevice shown in Figure 1. At release of pressure on upper Vside of diaphragm 1, piston 3 is returned to extremity, and a vent or overflow pipe 28 in its upper extremity. When pipe 28 is used as an overflow it can be piped directly back to storage tank, and when used as combination overflow and vent, canbe connected up as indicated in Figure 3.

I am aware that prior to my invention, fluids have been pumped by means of vibrating syhphons or diaphragms, but what I do claim for the present invention is a novel means of supplying fluid with constant head, and novel means of filtering fluids and trapping impurities within a device of this nature, in combination with fuel or lubricating system of a hydrocarbon engine etc.

What I claim as my invention is:

1. A fluid pumping device comprising an expansible chamber, a flexible diaphragm forming a wall of said chamber, a vented chamber on the opposite side of said diaphragm, a rod carried by the flexible diaphragm and slidably extending thru the opposite wall of the vented chamber, means carried by the extended portion of the rod forming with the said opposite wall a dash pot, a piston carried by the rod, check valve means carried by the piston, means forming a cylinder surrounding said piston, an inlet check valve for said cylinder, a self cleaning filter between the last named check valve and the piston, and a drain outlet communicating with said cylinder.

2. In combination, a casing, a fluid pump within the casing and delivering into said casing, a flexibly controlled diaphragm in the upper portion of the casing mounted between springs and connected by a rod to operate said pump, and means for controlling the maximum level in said casing, consisting of a member attached to the rod connecting the pump and diaphragm and a second member attached to the casing.

3. A casing including a fluid pump having an expansible chamber within, a movable wall for said chamber,van inlet check valve in the chamber and a filtering screen between the movable wall and the check valve,

.said fluid pump operated by a movable member flexibly mounted in the upper portion of the casing, a rod connecting kthe flexible member and the fluid pump, an immovable cup shaped member attached to the casing, a movable member attached to the rod cooperating with the immovable cup shaped member constituting a brake for controlling thel maximum liquid level in the casing.

4. In combination, a chamber, fluid pump means to discharge into said chamber, flexible means including a diaphragm and piston rod to operate said pump, brake means including a dash pot to resist the operation of the pump, and a conduit leading into the dash pot from the chamber, whereby when the level of the fluid in the chamber is high enough to cause a flow into the dash pot, the resistance to the operation of they pump will be increased.

5. In combination, a casing, a fluid pump in the bottom of the casing and delivering into said casing, flexibly controlled diaphragm means connected to a piston for operating said pump, said flexibly controlled diaphragm means supported in the central position by springs, and dashpot means for controlling the maximum level in said casing, one member of same attached to the pumping means and the other to the casing.

6. The combination of a casing, a pump means within the casing consisting of a diaphragm means, a rod connecting the dia- A phragm means to a piston, a fluid pressure means for operating the diaphragm and a manually operable auxiliary means for operating the diaphragm thru a flexible medium. i l

7. In a chamber, a pump, a piston, a cylinder, a rod connected to said piston, flexible means for reciprocating said rod, brake means for the pump comprising a dashpot and piston, one of said last named members being fixed, and the other being mounted on said rod and adapted to receive and compress liquid in said dashpot when the level of same within said chamber reaches a predetermined height.

8. In a fluid pump, a fluid chamber, a cup shaped member forming a cover for said fiuid chamber, a diaphragm 'arranged to cover the mouth of the cup thereby definingI 'a second chamber, and means for venting said second chamber comprising an annular member having substantiallyradial corrugations and mounted between the diaphragm and the cu shaped member.

9. In a uid pumping device a cover, and a flexible diaphragm forming an expansible chamber, a cup sha ed member forming a second chamber on t e opposite side of said diaphragm and a liquid container below said second chamber and means for venting the second chamber comprising an annular member having radial corrugations formed as part of the lower cup shaped member and mounted between the diaphragm and the said cup shaped member.

10. In combination, a casing containing in its lower central portion a fluid pump having an expansible chamber, an inlet check valve for said-chamber, a substantially horizontal filtering member between the movable wall and the check valve, a settling chamber below said filter member and a drain outlet in the lower part of said settling chamber, said combination constituting a pumping means within a casing capable of maintaining priming Huid within the pumping means after the casing is drained and means to retain filtered material in the settling chamber below the filtering member.

11. In combination, a chamber, iuid pump means to discharge into said chamber, flexcasing forming-a second reservoir, a drain means below said cylinder, a piston within the cylinder, a filter attached to the cylinder wall, positioned below the piston and adapted to be automatically cleaned of impurities by the movement of the piston above the lter, said second reservoir capable of being drained only thru the outlet of the said cylinder drain means.

14. In combination, a chamber, iuid pump means arranged to discharge into said chamber, flexible diaphragm supported by the walls of said chamber and connected by a piston rod for operating said pump, a fixed member attached to the casing, and a movable member attached to the piston rod constituting brake means to resist the operation of the pump.

15. A fiuid ump having a casing, an expansible cham er, a movable wall for said chamber, an inlet check valve in said chamb'er, an immovable filter screen attached to the chamber and located between the movable wall and the check valve, and a flexible diaphragm means supported by said casing and connected to said movable wall.

In testimony whereof I aiiix my signature.

CHARLESA A. WINSLOW.

ible operable means to operate said fluid v pump by a piston rod, and brake means includlng telescoping cups to resist the operation of the pump by compressing fluid between said cups.

12. In a pump, a casing, a cylinder within the casing, a piston operably within the cylinder, a rod connecting said piston y'and a flexible means for operating said rod, and governing means for said pump comprising a liquid brake to resist the operation of said rod, said governing means 'comprising a movable member attached to said rod and a stationary member attached to said casing and adaptable Jfor compressing liquids between said movable and stationary members.

13. The combination of a casing forming a reservoir, and having an outlet in its lower portion, a flexibly operated pump member within the casing, a cylinder within the 

